Selenium close browser- How to close the whole browser window by keeping the WebDriver active?

In my batch execution, multiple browsers with multiple tabs are getting opened for the first scenario. I wanted to close all these browsers before starting the second scenario.

Driver.close() is just closing one tab of the browser. Driver.quit() is closing all the browsers and also ending the WebDriver session. So, am unable to run the batch execution. Please provide a solution for this.